[ 987.431943][T30165] [ 987.432045][T30165] ============================= [ 987.432184][T30165] WARNING: suspicious RCU usage [ 987.432312][T30165] 7.0.0-rc3-virtme #1 Not tainted [ 987.432437][T30165] ----------------------------- [ 987.432563][T30165] net/ipv6/ip6_fib.c:111 suspicious rcu_dereference_protected() usage! [ 987.432752][T30165] [ 987.432752][T30165] other info that might help us debug this: [ 987.432752][T30165] [ 987.432994][T30165] [ 987.432994][T30165] rcu_scheduler_active = 2, debug_locks = 1 [ 987.433184][T30165] 1 lock held by ip/30165: [ 987.433315][T30165] #0: ffffffffb587f228 (rtnl_mutex){+.+.}-{4:4}, at: rtm_new_nexthop+0x1a6/0x8c0 [ 987.433550][T30165] [ 987.433550][T30165] stack backtrace: [ 987.433714][T30165] CPU: 3 UID: 0 PID: 30165 Comm: ip Not tainted 7.0.0-rc3-virtme #1 PREEMPT(full) [ 987.433717][T30165] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 987.433718][T30165] Call Trace: [ 987.433720][T30165] [ 987.433722][T30165] dump_stack_lvl+0x6f/0xa0 [ 987.433728][T30165] lockdep_rcu_suspicious.cold+0x4f/0xad [ 987.433734][T30165] fib6_update_sernum+0xfb/0x130 [ 987.433737][T30165] nh_rt_cache_flush+0x8d/0x380 [ 987.433742][T30165] replace_nexthop+0x347/0x6e0 [ 987.433747][T30165] insert_nexthop+0x41e/0x7a0 [ 987.433750][T30165] rtm_new_nexthop+0x3a0/0x8c0 [ 987.433754][T30165] ? insert_nexthop+0x7a0/0x7a0 [ 987.433755][T30165] ? lock_acquire.part.0+0xbc/0x260 [ 987.433759][T30165] ? find_held_lock+0x2b/0x80 [ 987.433765][T30165] ? lock_acquire.part.0+0xbc/0x260 [ 987.433766][T30165] ? find_held_lock+0x2b/0x80 [ 987.433772][T30165] ? find_held_lock+0x2b/0x80 [ 987.433773][T30165] ? insert_nexthop+0x7a0/0x7a0 [ 987.433775][T30165] ? __lock_release.isra.0+0x59/0x170 [ 987.433778][T30165] ? insert_nexthop+0x7a0/0x7a0 [ 987.433780][T30165] rtnetlink_rcv_msg+0x6fe/0xb90 [ 987.433786][T30165] ? rtnl_fdb_dump+0x620/0x620 [ 987.433788][T30165] ? __lock_acquire+0x577/0xc10 [ 987.433792][T30165] ? lock_acquire.part.0+0xbc/0x260 [ 987.433793][T30165] ? find_held_lock+0x2b/0x80 [ 987.433796][T30165] netlink_rcv_skb+0x123/0x380 [ 987.433800][T30165] ? rtnl_fdb_dump+0x620/0x620 [ 987.433803][T30165] ? netlink_ack+0xce0/0xce0 [ 987.433809][T30165] ? netlink_deliver_tap+0xc5/0x330 [ 987.433812][T30165] ? netlink_deliver_tap+0x13f/0x330 [ 987.433816][T30165] netlink_unicast+0x4a3/0x770 [ 987.433820][T30165] ? netlink_attachskb+0x810/0x810 [ 987.433822][T30165] ? __alloc_skb+0x4c4/0x5f0 [ 987.433825][T30165] ? napi_skb_cache_get+0x7a0/0x7a0 [ 987.433828][T30165] ? __lock_acquire+0x577/0xc10 [ 987.433831][T30165] netlink_sendmsg+0x735/0xc60 [ 987.433835][T30165] ? netlink_unicast+0x770/0x770 [ 987.433839][T30165] ? __might_fault+0x97/0x140 [ 987.433845][T30165] ____sys_sendmsg+0x419/0x850 [ 987.433848][T30165] ? copy_msghdr_from_user+0x270/0x430 [ 987.433850][T30165] ? get_timestamp.constprop.0+0x390/0x390 [ 987.433851][T30165] ? move_addr_to_kernel+0x40/0x40 [ 987.433856][T30165] ? lock_acquire.part.0+0xbc/0x260 [ 987.433857][T30165] ? find_held_lock+0x2b/0x80 [ 987.433860][T30165] ___sys_sendmsg+0xfd/0x180 [ 987.433863][T30165] ? copy_msghdr_from_user+0x430/0x430 [ 987.433864][T30165] ? __lock_release.isra.0+0x59/0x170 [ 987.433875][T30165] ? lock_vma_under_rcu+0x128/0x3e0 [ 987.433879][T30165] __sys_sendmsg+0x124/0x1c0 [ 987.433882][T30165] ? __sys_sendmsg_sock+0x20/0x20 [ 987.433887][T30165] ? do_user_addr_fault+0x799/0xdb0 [ 987.433892][T30165] ? rcu_is_watching+0x15/0xd0 [ 987.433895][T30165] ? rcu_is_watching+0x15/0xd0 [ 987.433898][T30165] do_syscall_64+0x117/0xfc0 [ 987.433903][T30165] ? exc_page_fault+0xaf/0xd0 [ 987.433905][T30165] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 987.433908][T30165] RIP: 0033:0x7f63319e0c5e [ 987.433912][T30165] Code: 4d 89 d8 e8 34 bd 00 00 4c 8b 5d f8 41 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 11 c9 c3 0f 1f 80 00 00 00 00 48 8b 45 10 0f 05 c3 83 e2 39 83 fa 08 75 e7 e8 13 ff ff ff 0f 1f 00 f3 0f 1e fa [ 987.433914][T30165] RSP: 002b:00007ffeaeb06150 EFLAGS: 00000202 ORIG_RAX: 000000000000002e [ 987.433916][T30165] RAX: ffffffffffffffda RBX: 000000000048a950 RCX: 00007f63319e0c5e [ 987.433918][T30165] RDX: 0000000000000000 RSI: 00007ffeaeb06210 RDI: 0000000000000005 [ 987.433919][T30165] RBP: 00007ffeaeb06160 R08: 0000000000000000 R09: 0000000000000000 [ 987.433919][T30165] R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 [ 987.433920][T30165] R13: 0000000069b99d39 R14: 0000000012ffb310 R15: 000000000049c620 [ 987.433926][T30165]